RESUMO
Aim and Background: the most important characteristic of a root end filling material is to provide an acceptable seal. Various materials have been already used as root end fillings in endonontic surgeries, none of them possess all desirable properties
Methods and Materials: in the present study, the sealing ability of a new experimental material known as cold ceramic was compared with glass ionomer. Cold ceramic contains calcium hydroxide as its chemical base, however, opposite Ca[OH],, it is capable of being set. Forty extracted human teeth were used in this experiment. The roots were cut at the cervical region from the crowns. After cleaning and shaping, 3mm at the apical region, of each tooth, was cut and a class I cavity of 2mm depth was prepared. The external surface, of each tooth, was covered by two layers of nailpolish. Then, the teeth were randomly divided into two groups; each was filled with one of the experimental materials, followed by embedding in normal saline solution for 10 days. The microleakage of all samples were then investigated electrochemically
Results: the results of this study showed statistically significant difference in the microleakage between two materials implying the minimum microleakage for the cold ceramic group
Conclusion: it can be concluded that the sealing ability of cold ceramic is more than glass ionomer